Granted Patent
Utility
US 6,322,897 · App. 09/450,400
Metal-ceramic gradient material, product made from a metal-ceramic gradient material and process for producing a metal-ceramic gradient material
Inventors:
Ralph Borchert, Monika Willert-Porada
Patented Case
View Patent ↗
Granted: Nov 27, 2001
Filed: Nov 29, 1999
Inventors
Ralph Borchert
Monika Willert-Porada
Assignee (at issue)
Siemens Aktiengesellschaft
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.